math ToolUpdated 2026-09-20
Arc Length Calculator & Formula
The arc length is the distance along the curved perimeter of a circle connecting two points on a circumference. Use this calculator to determine arc length, sector area, and chord length in degrees or radians with step-by-step mathematical solutions.
Frequently Asked Questions
What is the formula for arc length in degrees?
When the angle θ is in degrees, the formula is s = 2πr × (θ / 360), which simplifies to s = πrθ / 180.
What is the difference between arc length and chord length?
Arc length measures the curved distance along the circumference, while chord length measures the straight-line segment connecting the two endpoints.
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